![Haveyoueverwonderedwhybirdssing?Maybeyouthoughtthatthe...]( "Haveyoueverwonderedwhybirdssing?Maybeyouthoughtthatthe...")
- 問題詳情： Haveyoueverwonderedwhybirdssing?Maybeyouthoughtthattheywerejusthappy.Afterall,youprobablysingorwhistlewhenyouarehappy. Somescientistsbelievethatbirdsdosingsomeofthetimejustbecausetheyarehappy.However,theysingmostofthetimeforaverydifferentr...
- 6786
中文谷